This bulletin is being revised to add an additional model year and revise the text. Please discard Corporate Bulletin Number 01-05-25-004 (Section -- 05 Brakes).

ConditionSome customers may comment that the "Yellow" message, "Service Traction Active Handling", is illuminated on the Driver Information Center.

The technician may find chassis DTC C1288 -- Vehicle Stability Enhancement System (VSES) Steering Wheel Sensor Phase A and B. When this code is set, the VSES is turned off; ABS and TCS remain operational.

CorrectionVerify the Techline equipment has been updated with TIS software 12 or newer. If it has not been updated, do so now. This software was broadcast to dealerships on 11/13/01. Disc Number 12 will be mailed November 14, 2001.

Install the scan tool to the vehicle.

Enter the chassis applications.

Select F1: ABS/TCS/VSES.

Select F4: ID Information.

Select F1: Controller Information 2.

If the DE Calibration P/N is not 12220685, it will be necessary to update the ABS module.

The update cannot be performed until fuse #25 (Body Control Module-Ignition 1, Instrument Panel Control) 10 amp is removed from the instrument panel fuse block which is located on the passenger side of the vehicle (under the instrument panel and under the toe board).

Without removal of the fuse (prior to requesting information), unsuccessful reprogramming may occur.

Verify the ABS DE Calibration P/N. If it is not P/N 12220685, redo the SPS programing procedure listed above.

Clear the codes from all the modules.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.